Screw driver

The first electric screw driver was invented in 1925 by Wilhelm Emil Fein, while taking as a starting point the operation of the drilling machine. A screw driver is an electric tool which makes it possible to screw and to unscrew all types of Vis and Boulon S. Nowadays the screw driver saw its decreased weight. It passes 30 kg to its creation, to 3 kg on the recent ones, which facilitates its handling for all. In the same way, the recent screw drivers are not dependant any more on the electric sector, they are now provided with a refillable battery of great autonomy.

See too

• Screwdriver
• Work of wood

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